I want a guy I can't have. Any comfort would help?

I want a guy I can't have. Not that he is taken, that I know of, just not sure if he likes me. Knowing it will never happen eats a part of me in a way. When I see him my heart pounds, a warm feeling in my chest moves making its way to my cheeks, and not knowing what to do with this feeling I try to avoid it. This guy I know nothing about but a face, and a smile is making a girl who is afraid of commitment think other wise. I don't like this feeling at all. I never felt this way before, I don't even get butterflies in my stomach just a warm feeling.